Lift-bridge.



IIL, BARBIN GfIoN.

LIFT BRIDGE.

v APPLICATION FILED 00u14. 1910. 1 ,027,477. Patented May 28, '1912. y 4 SHEETS-SHEET I i FIG. Z

d; L .Herring/tua, Y I

J. LHARRINGTON.

' LIFT BRIDGE. APPLICATION FILED 0011.14, 1910.

' Patentel May28, 1912.

WITNESASE8l INVENTOR.

J.'L. HARRINGTON.

l LIFT BRIDGE. APPLICATION FILED 0GT.14, 1910.

Patente@ May 28, 1912.

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WITNESSES:

A 'I'TOBNE Y.

J. L. HARRINGTON.

LIFT BRIDGE.

APPLICATION FILED 00114, 1910.

`.Patented May 28, 1912.'4

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` clearness of illustration.

larged cross section of the bridge, viewed' 'uNrrnD sra'rns PATENT onirica.

JOHN LYLE HARRINGTON, O-`KA1\TSASCI'JTY,y MISSOURI.

LIFT-BRIDGE. y

Specication of Letters Patent. 'A Piaiiiented lIay 28,1912.,y

Application led October 144, 1910. Serial No. 587,050.

.To all flo/wm t may concern:

Be it known that I,".Io1-IN LYLE IjIARRING- TON, a citizen of the United States, residing at Kansas City, in the county of Jackson 5 and State of Missouri, have invented certain new and useful Improvements in Lift- Bridges;.and I do declare .the following to be a full, clear, and exact description ofthe invent-ion, such as will enable others skilled 10 in the art to which -it appertains to'make and use the same,reference being lhad to `the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

15 My invent-ion relates to double deck lift bridges; and has-for its principal object t-o provide a lift bridge characterized by 'a main lift span having a traffic deck, a lower deck suspended from the main lift span,

and motor driven means for raising and lowering the lower deck while the main span is stationary, thus retaining in service Y the trafiic deck of the Inainspan while the lower deck is`raised to permit passage of 2,5 vessels.

on the line IIe-II of Fig. I, omittingthe tower and the locking devices. Fig. .III is a view similary to Fig'. II, showing the lower deck vin raised 'position relatively to the niain span. Fig. IV is a shortened plan view of the main deck, also of the mechanism in the power house, the` roof thereof being removed. Fig. V is a sectional elevation of the upper portion of one of the towers, showing t-he weights, sheaves-and cables,

viewed in the direction of arrow a on Fig. I,I

omitting 'the bracing seen onFig. I. Fig.` VI is a detail plan View pf one of the locks for the lower deck span, .viewed on the line' vit-.vi of Fig. I. Fig. vii is a vertical section viewed-on line VII-VII of Fig. VI. Fig. VIII is adiagrannnatic view of the span actuating cables and drums.

Referring more'in detail to the parts 1 designates the stationary spans, the jouterv ends of which are supported by the piers 2. D designates, as a whole, the lower deck, which comprises the suspender posts 3, Vthe deck girders'l, the flooring 5, and the under frame 6. S designates, as a whole, the main span,

which comprises the girders 8, the flooring i r9, the top girders 1.0, the columns-7 ,con-

neeting said girders, and suitable crossbracing 12 between opposite columns: I/Vhen. 1n fully lowered position, vthe ends of this span rest upon four posts.`13,`which are set close to .and 1n` alineniefiptfjwith the lnner' tower columns 14; the span bejing'provided,

at each 0nd with lugs 15 that project into j the channeled members 14 of the tower'coluinns, as shown in Fig. VIV at the fleft.`

The columns 7 of the main span are hollow, and may be either latticed o1' box two web-plates 16, which arc spaced apart to receive between them the suspenderposts 3 of the lower'deck. The suspender posts are hollow in section, and secured within the upper end of'each, is a heavy rpin 17, to.

which a pair of lifting cables 18 are connected bymeans of clcvises 19, the upper ends of the web-plates 1G being` provided with notch seats 20,'t'or receiving the projecting ends of the pin `17'. By these devicesl the lower deck I) is supported by the 3 and 7 'when in its lowest position.;

posts 'type, and secured within each column are y' Y Built upon the tops of the iixed spans 1, i

are ythe two towers 23, which supporti the sheaves 24, and 25, over which the lower deck cables 18 and upper span cables 65 are passed. The lower deck cables 18 extend .g

upwardly through the columns 7, through.- holes 31 in the top gil-ders l() of the span S, oversheaves27, which are inountedconfsaid girders, under drums 28, which fare. journaled in bearings 30 risingy from horizont-al plates 30, secured tothe topwof the main'span S at the four corners thereof, up to and over sheaves 24, and depend within the towers; counter-weights 29 being attached thereto, whose combined weight.l

equals that of `the lower dect-D, while the cables G5, which are connected with' the ends *Jiriof the upper span S; pass upwardly over the sheaves and down into the towers where they support the counterweight Gl.

Built upon the top of the main span S is the power-house 82, haring a floor 33 upon which mounted the mechanism to he described. In Figs. l, lll, and iV, numeral 9 designates the floor or deck of the main span, the same being broken out in Fig. .lV to permit the full length of the span to he shown on a relatively large scale` In Fig. IV, '3i designates the bearing,r ot the several Shafts, whe-root' 235 is the motor shafE provided with two clutchee, indicated at 36, whereby it may be coupled to either or both of two motors, 3T. Said motore` are provided with brakes 38, which may he ot' the Spring-set and electricallyaelcased type, so that the mere opening Vof the brake circuit will set the brakes, the electrical circuit diagramsnot being shown, as these matters are within the knowledge of any electrician. Preferably electric motors are employed. andthe controllers thereof located within the house 32, the current being conducted to the power house by any suitable derice (not shown).

Keyed on the motorshaft are two piuions 39, 40, which drive, respectively, the gearing for moving the upper Span and the lower deck. 'ihe pinion 39 meshes with a gear 4l, that is connected by a, friction clutch 42 with a pinion 41.5,' which meeheh with a gear -l-l keyed on a shaft 45, on which is kelcd a cable druin 46. The other pinion 4() on motor shat't 35 meshes with two gears 417, which are connected by friction clutches, indicated at 48, with pinions 49. ltiuous 49 mesh with gears-50, on Shafts 5l, having pinions 52 which mesh with gears :7S- on two shafts 5t which extend from side to side 'of the housel 32 and project through its outer walls. Upon the projecting ends ot' said shafts are keyed cable drums 55 and 55. 0n the drum .bearing platee Btl. in aline ment with drums 55 and 55', are. iheart-.s

Drums 98 are keyed in pairhl upon two shafts 7,.havin ,vF intermediate bearings 58. Between said bearings 5S, on each `shaft 57, is a drum 59, which is in alinelnent with cable drum Lt6. Said drum hac` driving;l connection with one drum 59 by .two ropes G0, which are not crossed. Said drinn 4G also has driving connection with the other drum 59 by two rope` 6l which are crossed,

in order Ato more this end ol' the lower deck in the proper direction as indicated in Fie. I. l Thus, the large drums 28 are driven by the cables (St), til, and as these'larefel drums` 28 are -trictionally engaged h v the lifting,r cables 1S of the lower pam said ripan may be, raised and lowered h v the operation ot' one or hoth ol' the motors 23T.

'l`he eahlehI 2V and zo', h v which the main spam is raised and hovered, are disposed as vsheaves 25 on the towers shown in Figs. lV, I and Vllii. The tippe. end of each of Said cables is anchored to the 'towers 23, at From this point the cable paseos down to sheave 56, under erta-ie, and horizontally to a drinn F15-55@ around which it. may lie wound pli'irztlity of turns, then paese4 hack to Sheave 5G, over same, and downwardly to a lug 63 wiiere its end is made tast; to the tower.

lt is apparent. that the cahle 9G croes 7;, while the cable 26 not in order nieve both endy ot the main span in the sante i rection when both of the drums; i revolve in thesame direction, as when hotlr. are driven from one pinion.

The elutchee; #l2 an.. it@ permit the moti power to be applied Separately to the s, n or simultaneously to the lower deelt. Thus, if it he desired to lift the lower dec without lifting the main Span. the tw clutches` 48 are opened and the clutch 42 closed. But it' it he desired to litt t e nu n span and the `lower deck togelt 26 or 2li at each corner of the span is; alt-- chored at the top of a tower, paezscfi und-er a sheave 56. around a drum. or o5", over aheave 56 and then anchored to the hott' of the tower, revolution of the drinne in one direction will cause one o'f the cahier. to he wound on laid drums and litt. the hy`pres ure of the eahles on the at the cornet-e` of the Span, the othe being paid oli as the span rises. ot" direction of operation ot' drains causen a rerersal in the actuation or' the. cables, so that the span .is pulled downwardly by one Het' of cables while the oth" are in turn paid eti? the drum; 552 F rl`he span is cotlnterllalanced by we' :l Y suspended from calde-s 65 which par@ over 23 and :um cured to lugs G6 on the bearing plates in practice, four cables 65 will he attached ii/o to each corner of the span, and will over the tower .sheavel as cearly shown Fiff. V. The main spans is adapteift tt either railway or highway tratiie; so also is the lower deck D.

When a. vessel approaches the lirifl sutiicient height to strike the lowes 4, lout not sntiiciently high th si.. main deck or span, the bridge operr opere; the main span clutches 4S and cloaca clutch enough to clear the vessel, the motors are I `-I claim as new therein and desire to secure the deck independently of the span.

' and the deck is lowered again.

vthe operation of the'cables vhaving been al- 15V position to permit the lpassage'of other boats.

ing the bridge, though itis preferred to op- -opening its clutch 36, thereby reducing the lport-ed by the main span, and means -for 'raising and lowermg saldl lower deck while rmain span, means for raising and lowering- 42 and starts the motors 37 to raise the lower deck. When the lower deck has been raised to the position shown in Fig. III, or high stopped.' The vessel passes under the bridge,

Should the vessel have masts or very tall stacks, so that it will not pass under the main span in itslower position, the bridge operator may first raise the lowerdeck, then the main span, which latter will lcarry with it the lower deck. The raisingof themain Span is initiated by closing the clutches 48;

ready described. 7 AAfter the main span has been lowered to its normal position, the clutches 48 'are opened, thereby disconnecting the power from the main span cables, and the clutch 42 is closed and the motors continue to 'run until the lower deck has been lowered, unless it be necessary to hold same in elevated .By lreason of the arrangement shown of the motors,` gearing and clutches, either one of the motors may lbie employed for operate crate both motors together. 'If one motor breaks down or fails to start, the other motor will carry the load.' In such a case itis desirable to un'couple the dead motor by worknf the other motor as muchas possible. vHand operatedwinches may be provided for operating the mechanism when the motors areinoperative.

Having thus described my invention, what by Letters-Patent is:`

1. In a lift bridge, a .vertically movable lower deck, a vertically movable lspan located above the deck,and means for lifting 2. In a lift bridge, a vertically' movable upper span, a vertically movable lower deck supported by said upper span', and separate means for lifting the span and deck.

In a lift bridge, a vert-icallymovable main span, means for raising and lowering same, a vertically movableglower deckl supthe said main span is in-traiiic carrying posit-ion.

4. In a lift bridge, a vertically movable same, a vertically movable lower deck supported by the main span, and means carried by said mam span for raising and .lowering said lower deck while the said main span is in traiiic carrying position.

5. In a lift bridge, avertically movablev lower deck, and -a vertically movable superposed span; the former being movable independently of said superposedspan, and

means for movingsaid deckindependently "of the span. or for moving both simultaneously. y

6. In aflift bridge, ak vertically movablel upper spana vertically movable lower deck supported by said upper span, and separate counterweights for said span and deck, and

towers at the ends of the approaches, a'vertically movable main span adapted for join? ing the lsuperposed decks of the approaches,

a separate vertically movable deck adapted.

for joining the lower decks of the approaches, means for actuating the lower' movable deck independently of the .main

span, and means for actuating the lmain span. f I. l t 9. Inl a. bridge, approaches, each' having alower deck, and a superposed deck, spaced towers at the ends of the approaches, a main travel in the plane of the upper decks ofthe vspan adapted for vertical travel between the` towers and having the lower` limit`of -itsl approaches, a deck suspended from the main` span and adapted for vertical movement between t-he towers, the lower limit` of travel `f oi." said movable deck being in the plane of the lower decks of the approaches, andseparate means for raising and lowering the span and deck.

In testimony whereof I affix my signature lin presence of two'witnesses.

JOHN LYLE HARRINGT'ON'.

llitnesses:

MYRTLE M. JACKSON, ARTHUR W. CAPs. 

